Inertia-actuated weft detector on a transferrer arm



Nov. 13, 1928.

K. J. UNWIN INERT'CTUATED WEFT DETECTOR ON` A TRANSFERRER ARM Filed Nov. 1o. 1927 Patented Nev. 13,v 1928.

narran ,serMmsv PATENT ortica.

KENNETH J. UNWIN, or-WORCESTER,MASSACHUSETTS, nAssrenon. To onoivrrroi` we xNowLnS LooM WORKS, or WORCESTER, MASSACHUSETTS, A oonronaroiv or MASSACHUSETTS.

INERTiA-ACTUATED WEET DETECTORN A 'rRANSFnitRnR ARM.`

' Appiiqatie'n 1aed nbvemiier 10,19%. -serial No; asaltar This invention relates to improvementsin weft detectors mounted on regularly moving transterrer arms and 1t is the generalob* ject of the invention to' provide a detector slidable on the transterrer arm and actini ated by a weightedmember as the transferrer arm arrives atvk its lowest position.

In co-pending application Ser. No. 120,- 4:90 tiled by Turner there is shown a deteotor in the transferrer arm actuated by a weighted device thel inertia of which tends to'give the detector an indicating movement Y as the transferrer arrives in its lowest posi tion. In another co-pending application Ser; No. 232,432 filed by Cederlund there is Shown a detector carrier s'lidable in a direc-- tion parallel to the yarn being detected so that the operation ofthe detectork will not be interfered with by a pivotalmovement as has been the Case heretofore when detectors of theside slipping type Carried on the transierrer arm have been pivoted there to. It is an important object `of my present invention to utilize the inertiaprineiple set forth inthe Turner application and the `slid.` ing detector carrier shown in the Cederlund` 'application with the resulting easier^ contact 1 between the detector teeth yand the yarn. In the Said Turner application the inertia force isl exerted in a vertical direction but ywhen this idea is applied' to a detector carrier slidable in a horizontal direction it is necessary to provide means for converting the vertical motion into a' horizontal one and 1t* is a further object` of my invention'to ac@ complish this last named result. y j

It is astill further object of my' invention to 'provide a singleresilient means inter-A posed between the weighted member and the latchwhich controlsth'e position of thev indiratiiig plunger.,v A Y y `lVith these andr other objects in view which will appear as the description proc'eedsyniy invention resides inl thefcombination andarrangementt'ot hereinafter described and, set forthin the claims. 1 l

In the 'aecompanying drawings' wherein one forni of my invention 1S Shown,

Fig. 1represe`ntsa vertical'secti n d .t thiish that" part et the transfer-rer arm whiohfe'rx -on the plunger.

tends lover the bobbin, the 4parts being. in the position they assume when suiiicient wett 1g. 2 1S a view similar to Fig. 1 but with theparts moved to indicating position,r

Fig 3 is a fragmentary top plan view taken in the `direction of arrow 3,- Fig.y 1,

Fig. 4 is a fragmentary horizontal section on line l 4 of Fig. l,

Fig. 5 is a vertical section on line 5 5 of Fig. 1, and i i (i iS adiagraimnatic view' oi' `the mounting oi' the transferrer arm;

Referring to the drawings the transferrer a'rmmlO is provided with'an extension; 11 extendingnormally above-and parallel to the bobbin B to be detected. Said transferrer' arm is given regular movements about' a iiXed stud S, Fig. G, as is fully described in the patent to Ryon No. 1.372,316. f The extension is provided with spaced walls 1.2 whichdeiine a slot 413 in which the operan` ing mechanism of t-hedetector is located. A plunger 14 is guided so as to `move inV a direction substantially parallel to the bobbin B., the `left end being received by a web 15 and the rightend projecting beyond the body'v of the transferrer arm at the time offindicati'on to coopera-te withl an indicatin lever 1G, as shown andv fully described in patent to Ryon No. 1,551,219.

The ycontrol for the plunger 14 .ineludes a hook-,19"lield by a tension spring.2O-'nor` mally` in notch 2l formed on the lettendotr the plunger.` A tail 22 depends from the latch and forms part ot' the means by which the plunger is released. A helical compres sion spring 23 surrounding a portionnf the plunger lies between a clip'24l fast onthe transferrer arm and a kshoulder` 25fo1`med At indication ot' weft eX- haus'ti'on the latch is moved in counterv clockwise direction as viewed in `1 aroundpits stud 18 to release the plunger, whereupon spring 23' moves the plunger from the non-indicating position shown `in Figmlto the indicating `position shown in Fig. 2 Vwhen thev transferrer girm isinits lowest' positimi,` so that as ,said arin rises' it tially horizontal and' vwhich is slidably'" guided by slots 30 which lie opposite each Vother and are formed in the walls 12. A .helical ycompressionspring 3,1 vrsurrounds f a element and conf rlined between shoulders 32 'lfoiinedfonvthei portion ot' Vthe, detect shank 26 and the upper horizontal portion 33 of the carrier7 said spring holding the detector yieldingly in its lowest position and permitting the detector to be movedl np-V wardly relatively to the carrier. The taill 22 of the latch extends in the pat-h of the cai'- .iierto be moved by the lattervat the time of The detector.

substantial weft exhaustion. y element and its `carrier may besubstantially the same vas set orthin theV aforesaid copending application liled by Cederlund,

My invention relates more particularly yto the means for imparting a horizontal. movein'ent vto the carrier 28 through the inter-w mediary of a' weighted device andin carrying my invention; intoeiiect I extend between the walls 12 a pivot pin O on which is mounted for fi'ee'rotationa weighted arm l1 from the lower por ion of which depends finger@ which engages the web 15 and also affordsy support for `the right end oic the Vtension spring 20. By this-construction 'said spring 2O yieldinglyholds the weight 41 in raised position and also yieldingly holds the latch locked. Thelet hand end ot the arm asshown in Figs. 1 and 2 provided with anextension 43, which vmay have concentric f tivelytherewith.`

respectively, which are eccentric with respect to the pin 40., The extension passes slidably through an opening i6 formed in the upper Y .horizontal portion 33 of the carrier and is proportioned to. move downwardly vrelalii operation the parts are normally in the position shown in Fig.V 1 with the in `-.-dicating plunger in its inward or non-indias Vshown in Fig.y 1.V` On each detecting.

eating position being retained by the llatch and with the weighted arm il held in raisel position .by the spring 2() so that'the' carrier and the detecting element are to the lett as the transferrer arm arrives at the botcm ofvits stroke the weight of the armfll bvecai'ise of the momentum thereof will tend. te descend to move the carrier horizontally in the guide slots 30. ;"lhis action takes place after the teethy 27 have engaged the surf part-ironeat `w22 to inove the saine in a ycounter'-clocliwise direction yabout its pi fot, to release the indicating plunger 1li. 'llie` latter vwill theref upon vmovefunder the indication lever 16 as V shown inligf2 to initiate'replenishment'as is shown in the a:li'oresaid'V patents. During the time that the weighted arm nievesA downwardly relatively to the ,transferi'er' ariii the -tension l.spring 20.is extended-and as soon' the torce ont the weighted *arm is spent said spring will contractfto raise v,the

weighted arin'froni the positionshown in l Fig 2 to that shown in Fig. lythe surface 15 under these conditions engagingthe left end of the slet 4G to move the carrier to the left to restore the saine `to the normal position shownin Fig; 1. `During the continued npward movement of the'transterrer arn'i the plunger will be reset by mechanism not. shown herein but'setv forth in the aforesaid Ryon Patent No, 1,551,219.' y 'y l' f `From the l'oregoing it *wilA be seen .that l' have k.provided self-contained means for iing a horizontal sliding movement to the detector and carrier by means'o'f a downward force eXei-tedby the weighted armll. It will fiirther bessen that the spring 20v` act-sto raise the weightedaiin to position the lcarrier and acts also to hold the latch. iii'norinal loeliingposition.YA 'Y `llaving thusndeseribed my inventiony il. willl be seen that change and modilications may be made therein by 'those skilled in theV art.withoutdeparting from the spiritl and scope of the invention andlP do tnot wish to be limited to the details but what l claim isiy y* 1.x. ln a weit detector'for a loom having a regularly moving transterrer arm on which, isv mounted angindicating' plunger, a movable latch normally holdingfthe plunger in ion-indicating position, a, carrier slidabley on the transferrer arm in a Idirection substantially parallelV to the surface being. detectecha detector mounted on the carrier7 a weighted Vmember pivoted to the transferrer arm and free to move' downwardly relatively to the vtransferrer after the latter has reached herein disclosech `the bottom of its stroke due to the 'momentum ofvsaid weighted arm', and means delining a connection toetween the weightedarm vand lthe 'carrier whereby'y the downward motion l il) of the rweighted arm is caused to move the carrier in a substantially:horizontal d1rec- `tion parallel to-the surface being detected,

` et the loom.

yte

2. In a weft detector tor a loom'having a regularlymoving transterrer arm on which is mounted an indicating plunger, a movable latch normally holding the plunger -fin non-indicating position, a detector carrier movable ina substantially horizontaldireetion at weft exhaustion to engage the latch and said carrier being guided forsliding movement relatively to the transferrer arm, a detector mounted on the carrier, and a weighted member held yieldingly in raised position and tending to move downwardly relatively to the transterrer arm after the latter has arrived at the bottom of its stroke due to the momentum ot the weighted member, said weighted member when tending to move downwardly exerting a force on the carrier tending to move the latter horizontally and in a direction substantially parallel to the surfaces being detected.

3. In a weft detector for a loom having a regularly moving trans-ferrer arm on which is mounted an indicating plunger, a movable latchnormally holding the plunger in non-indicating position, a carrier to engage the latch, a detector mounted on the carrier, means defining guides for the carrier on the transferrer arm extendingin a horizontal direction and substantially parallel to the surface being detected, a weighted member pivoted on the transferrer arm and tending to move downwardly after the transferrer arm comes to rest due to the momentum of the weighted member, and an eXtension carried by the weighted Vmember and having a portion to engage the carrier and tend to give the latter a horizontal motion when the weighted member moves down wardly, said member when moving under the influence ot the extension of the weighted member engaging the latch to move the latter to plunger releasing position.

4:. In a wett detectorvtor a loom having a regularly moving transferrer arm on which is mounted an indicating plunger, a movable latch normally holding the plunger in nonindicating position, a carrier guided on the traiisierrer arm for sliding movement relatively to the transierrer arm in a direction substantially parallel to the surface being detected, a detector element mounted on the carrier, a weighted member movable relatively to the transterrer arm and tending to move downwardlyV after the transterrer comes to rest at the bottom of its down stroke .because of the momentum of said weighted member, an extension carried by the weighted member projecting between spaced .when the weighted `member tends to move downwardlyand,the other of said portions cooperating with another part of the extension and :tending to move the carrier in the opposite direetionto restore the samelto Vnormal position after an indicating movement of the carrier when theweightedmember moves upwardly.y Y

5.A In a weft detector'ior a loom having a regularly movingtransferrer arm on which is mounted an indicating plunger, a `movable latch normally holding the plunger in non-indicating position, a carrier guided -for sliding moven'ient relativelyl to thek transerrer arm in a direction substantially parallel to the surface being detected, a weft deteetor mounted on the carrier and capable ot yielding movement relatively thereto, a weighted 'member yieldingly heldv in raised position, means deiining a pivotal connection between the weighted member and the transierrer arm, said weighted member tending to move downwardly around the pivotal connection after the transferrer has reached the bottom of its donward stroke due to the momentum of the weighted arm, and a curved extension rigid with the weighted arm and projecting through a slot formed in the carrier, said curved extension .being formed on an are eccentric with re spect to the pivotal connection, said extension and weighted member engaging one side of the slot to move the carrier horizontally inone direction substantially paral? lel to the surface being detected when the weighted member moves downwardly and said extension engaging the other side of the slot to move the carrier in the opposite direction when the weighted member moves upwardly.

Y 6. In a wett detector ior a loom having a regularly moving transterrer arm on which is mounted an indicating plunger, a movable latch .normally holding the plunger in non-indicating position, a detector carrier slidably .mounted on the transferrer arm to move in a direction substan 4tially parallel to the surlace being detected,

a detector mounted on (the carrier, a weighted actuator movably mounted on the transferrer arm, operative connections between the actuator and carrier effective through the downward movement oit the actuator due to its momentum to move `the carrier relatively to the transterrer arm after the latter has come to restat the bottom of its downward stroke on an indicating beat of theV loom, and a single resilient means interposed between the weighted member and the latch and tending to hold the latch in normal rocking position rela-` .lill

Ward movementot' the actuator due to its momentum to move the carrier relatively to the transferrer arm after the latter has come to rest at the bottom of its downward stroke on an indicating beat of the loom, andy a single resilient means `interposed between and Supported by the weighted member and the latch and tending to hold the latchA in normal rocking position relatively to the plunger and tending also to hold the Weighted member yieldingly in raised'position. o

In testimony whereof I have hereunto affixed my signature.

KENNETH J. UNWn; 

